docs: improved SEO of documentation (#3117)

* docs: added description to documentation pages

* docs: added more descriptions

* docs: finished improving meta description

* docs: added searchbox structured data

* docs: added breadcrumbs structured data

* docs: added how to structured data

* docs: improved 404 page

* docs: added how-to frontmatter option

docs/content/advanced/backend/services/create-service.md

@@ -1,3 +1,8 @@
+---
+description: 'Learn how to create a service in Medusa. This guide also includes how to use services in other services, subscribers, and endpoints.'
+addHowToData: true
+---
+
 # Create a Service
 
 In this document, you’ll learn how you can create a [Service](./overview.md) and use it across your Medusa server just like any of the core services.

docs/content/advanced/backend/services/overview.md

@@ -1,3 +1,7 @@
+---
+description: 'Learn what Services are in the Medusa server. Services represent bundled helper methods that you want to use across the server.'
+---
+
 # Services
 
 In this document, you'll learn about what Services are in Medusa.